Determine the amount of water that can be heated to 10 ° C, giving it 84 kJ of heat.

Determine the amount of water that can be heated to 10 ° C, giving it 84 kJ of heat. Specific heat of water 4200 J / kg ° C

Initial data: Δt (change in water temperature) = 10 ºС; Q (amount of heat imparted to water) = 84 kJ (84 * 10 ^ 3 J).

Reference values: according to the condition Sv (specific heat capacity of water) = 4200 J / (kg * ºС).

The amount of water that can be heated by 10 ºС is determined from the formula: Q = C * m * Δt, whence m = Q / (C * Δt).

Calculation: m = 84 * 10 ^ 3 / (4200 * 10) = 2 kg.

Answer: You can heat 2 kilograms of water.